Surface protective film and optical laminate
By using an acrylic adhesive layer with specific water contact angle and tensile shear force in the surface protective film, the problem of polarizer end deformation caused by non-fluorine materials was solved, and a high-adhesion optical laminate was achieved.
CN122110352APending Publication Date: 2026-05-29NITTO DENKO CORP
Patent Information
- Application Number
- CN202511197695.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-11-27
- Filing Date
- 2025-08-26
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
After replacing fluorine-based materials with non-fluorine-based materials, the ends of the polarizer are prone to deformation, which reduces the adhesion of the surface protective film.
Method used
An acrylic adhesive layer with specific water contact angle and tensile shear force is used to improve the adhesion between the surface protective film and the substrate. By forming an adhesive layer on the substrate film, the peel force and tensile shear force are ensured to reach specific values.
Benefits of technology
It effectively suppressed the end deformation of the polarizer, improved the adhesion between the surface protective film and the adhered object, and ensured the stability of the optical laminate.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122110352A_ABST
Abstract
The present application provides a surface protective film in which an end portion of an adherend is not deformed, and an optical laminate provided with the surface protective film. The surface protective film according to an embodiment of the present application is provided with a base film and an adhesive layer, and has a peeling force of 0.025 N / 25 mm or more with respect to an adherend having a water contact angle of 70° or more and less than 90°, and a tensile shear force of 5.0 N or more with respect to an in-plane direction of the adherend, where the tensile shear force with respect to the in-plane direction of the adherend is a breaking force measured in accordance with JIS K 6850:1999.
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Citation Information
Patent Citations
Manufacturing method of thin polarizing film
JP2012073580A
Protective film, polarizing plate, method of manufacturing polarizing plate, and method of manufacturing image display device
JP2023121228A